Exploring Polaritons in Layered Two-dimensional Materials
| Date/Time: | Monday, 29 Jan 2018 from 4:10 pm to 5:00 pm |
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| Location: | Phys 0003 |
| Phone: | 515-294-5441 |
| Channel: | College of Liberal Arts and Sciences |
| Actions: | Download iCal/vCal | Email Reminder |
Exploring polaritons in layered two-dimensional materials
Zhe Fei
Abstract: Polaritons are hybrid light-matter modes involving collective oscillations of polarization charges in materials. They provide practical approaches toward nanoscale light trapping and manipulation. In recent years, varieties of polaritons were discovered in layered two-dimensional (2D) materials. Due to the reduced dimensionality and exceptional sensitivity, this class of materials have shown many unique polaritonic properties and physics. In this talk, we present our recent nano-optical studies of polaritons in layered 2D materials using the state-of-the-art scanning near-field optical microscopy - a powerful technique enabling ultra-small and ultra-fast imaging and spectroscopy in a wide spectral range from terahertz to visible. With this powerful tool, we performed systematic investigations of plasmon polaritons in graphene, bilayer graphene and graphene nanostructures, phonon polaritons in hexagonal boron nitride, and exciton polaritons in group VI transition metal dichalcogenides. Novel physics and potential applications associated with these polaritonic modes will be discussed.
Bio: Zhe Fei is currently an Assistant Professor in the Department of Physics & Astronomy at Iowa State University. He received his Ph.D. in Physics (2014) at the University of California, San Diego, B.S. in Physics (2006) and M.S. in Physics (2009) at Nanjing University. Before joining ISU, he served as an Assistant Scientist at the Center for Nanoscale Materials, Argonne National Laboratory. He joined the faculty of Iowa State University in September 2015. His research is focused on exploring the nano-optical physics and properties of low-dimensional materials with advanced near-field techniques.